# The polars of the point (3,4)(5,-12)and (6,t) w.r.t a circle are concurrent.Then t=

1.  4

2.  3

3.  2

4.  1

4

1

Explanation :
No Explanation available for this question

# The inverse point of (2,-3) with respect to the circle x2+y2+6x-4y-12=0

1.  (-11/2,9/2)

2.  (1/2,1/2)

3.  (5/2,-5/2)

4.  (-1/2,-1/2)

4

(-1/2,-1/2)

Explanation :
No Explanation available for this question

# If the number of common tangents of the circles x2+y2+8x+6y+21=0, x2+y2+2y-15=0 are 2,then the point of their intersection is

1.  (8,5)

2.  (8,-5)

3.  (-8,-5)

4.  (-4,-3)

4

(-8,-5)

Explanation :
No Explanation available for this question

# The area bounded by the circles x2+y2=1 and x2+y2=2, and the pair of lines 2x2-3xy-2y2=0(y>0)is

1.  π

2.  3π/4

3.  π/2

4.  π/4

4

π/4

Explanation :
No Explanation available for this question

# the sum of the coefficients in the expansion of (x + y)n is 4096, then the greatest coefficient is

1.  14C7

2.  12C6

3.  12C5

4.  11C5

4

12C6

Explanation :
No Explanation available for this question

# The sum of the coefficients in the expansion of (1-x)10 is

1.  0

2.  210

3.  -1

4.  1

4

0

Explanation :
No Explanation available for this question

# In ΔABC,if r1=12,r2=18,r3=36 then the length of the altitude through A is

1.  32

2.  26

3.  18

4.  24

4

24

Explanation :
No Explanation available for this question

# If in a binomial distribution n=20 and q=0.75,then its mean is

1.  6

2.  5

3.  10

4.  15

4

5

Explanation :
No Explanation available for this question

# From the top of a mountain of 200 meters height,the angle of the top and the foot of the lamp post are π/6,π/3.Then the height of the lamp is

1.  400/3

2.  200/3

3.  400/√3

4.  10/√3

4

400/3

Explanation :
No Explanation available for this question

# If

1.  a2+b2/c2+d2

2.

3.  (a2+b2/c2+d2 )2

4.  (a+b/c+d )2

4